DX: define developer environment with uv

[redeboer]

• Closes Speed up Binder builds by limiting dependencies policy#64
• Closes Speed up creation of developer environment policy#333
• Closes Clean up tox configuration with base key policy#408

Tasks

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1. Share passenv through testenv
2. Remove FORCE_COLOR
3. Set PYTHONWARNINGS= in doc job (if needed)
4. Write CLI flags in full, with quotation marks, and with = sign
5. Use --ignore instead of --re-ignore in sphinx-autobuild
6. Set random port for sphinx-autobuild (--port=0)
7. Check descriptions with tox list
8. Improve main tox run, i.e. reconsider the envlist under [tox]
9. Group doc jobs for tox list (i.e. docnb right after doc and docnblive right after doclive)
10. List .virtual_documents and .ipynb_checkpoints under --re-ignore